TypeError: this._sigma_scale is null
_init@/home/francisco97/.local/share/gnome-shell/extensions/blur-my-shell@aunetx/prefs.js:31:9
buildPrefsWidget@/home/francisco97/.local/share/gnome-shell/extensions/blur-my-shell@aunetx/prefs.js:133:12
_init@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:207:40
OpenExtensionPrefsAsync/<@resource:///org/gnome/Shell/Extensions/js/extensionsService.js:122:28
asyncCallback@resource:///org/gnome/gjs/modules/core/overrides/Gio.js:115:22
run@resource:///org/gnome/Shell/Extensions/js/dbusService.js:177:20
main@resource:///org/gnome/Shell/Extensions/js/main.js:19:13
run@resource:///org/gnome/gjs/modules/script/package.js:206:19
start@resource:///org/gnome/gjs/modules/script/package.js:190:8
@/usr/share/gnome-shell/org.gnome.Shell.Extensions:1:17